CEcl2Eq:

Path: SC/Ephem

% Transformation matrix from ecliptic to Earth equatorial planes.
   This is a single rotation about the x-axis. If the jd is not input it will 
   use the mean obliquity for J2000.0. 

   Since version 1.
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   Form:
   c = CEcl2Eq( jD )
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   ------
   Inputs
   ------
   jD            (1,1)    Julian date

   -------
   Outputs
   -------
   c             (3,3)    Transformation matrix from the ecliptic plane
                          to the equatorial plane

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   References: Montenbruck, O., T.Pfleger, Astronomy on the Personal
               Computer, Springer-Verlag, Berlin, 1991, p. 15.
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